Chair

There are many diffident type of chairs, dining, reading, study, relaxing, etc, they come in many different shapes and sizes. These forms of chairs usually adhere to relatively the same structure even if they take a completely different form. One thing remains constant are the forces that a chair needs to be able to withstand. The joints involved in the construction of a chair include joining the legs together and in some cases the rails that run lower down on the chair to stop the legs form spreading.